<template>
  <el-menu default-active="1-4-1" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose" :collapse="isCollapse" background-color="#545c64" text-color="#fff" active-text-color="#ffd04b">
    <h3>{{ isCollapse ? '后台' : '通用后台管理系统' }}</h3>
    <el-menu-item @click="navJump(menu)" v-for="menu in noChildren" :key="menu.name" :index="menu.name">
      <i :class="`el-icon-${menu.icon}`"></i>
      <span slot="title">{{ menu.label }}</span>
    </el-menu-item>
    <el-submenu v-for="menu in hasChildren" :key="menu.label" :index="menu.label">
      <template slot="title">
        <i :class="`el-icon-${menu.icon}`"></i>
        <span slot="title">{{ menu.label }}</span>
      </template>
      <el-menu-item-group v-for="menuChildren in menu.children" :key="menuChildren.name">
        <el-menu-item @click="navJump(menuChildren)" :index="menuChildren.name">{{ menuChildren.label }}</el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>
<script>
export default {
  name: 'Nav',
  data() {
    return {
      // isCollapse: false,
      navData: [
        {
          path: '/',
          name: 'home',
          label: '首页',
          icon: 's-home',
          url: 'Home/Home',
        },
        {
          path: '/mall',
          name: 'mall',
          label: '商品管理',
          icon: 'video-play',
          url: 'MallManage/MallManage',
        },
        {
          path: '/user',
          name: 'user',
          label: '用户管理',
          icon: 'user',
          url: 'UserManage/UserManage',
        },
        {
          label: '其他',
          icon: 'location',
          children: [
            {
              path: '/page1',
              name: 'page1',
              label: '页面1',
              icon: 'setting',
              url: 'Other/PageOne',
            },
            {
              path: '/page2',
              name: 'page2',
              label: '页面2',
              icon: 'setting',
              url: 'Other/PageTwo',
            },
          ],
        },
      ],
    };
  },
  methods: {
    handleOpen(key, keyPath) {
      console.log(key, keyPath);
    },
    handleClose(key, keyPath) {
      console.log(key, keyPath);
    },
    navJump(menu) {
      if (this.$route.path !== menu.path && !(this.$route.path === '/home' && menu.path === '/')) {
        this.$router.push(menu.path);
      };
      this.$store.commit('CHANGE_TAGS',menu)
    },
  },
  computed: {
    // 没有子菜单的nav
    noChildren() {
      return this.navData.filter((item) => !item.children);
    },
    // 有子菜单的nav
    hasChildren() {
      return this.navData.filter((item) => item.children);
    },
    isCollapse() {
      return this.$store.state.nav.isCollapse;
    },
  },
};
</script>
<style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}
.el-menu {
  height: 100vh;
  border-right: 0;
  h3 {
    color: #fff;
    text-align: center;
    font-size: 16px;
    line-height: 48px;
    font-weight: 400;
  }
}
</style>
